Something to look out for when choosing remap..
Seeing a few cars come thru here these past months for dyno runs etc... and a reasonable number of them from assorted "maps" seem to run them on stock, factory fueling, but up the boost.. They make good power until the egt protection kicks in (talking wideband cars here in the main, with egt protection etc)
What happens is whilst running bone stock fueling on lambda, whilst upping the boost they also run uber hot.. Often during a power run which only lasts 12secs, egt fuel dump will kick in ~5krpm, and CF timing pull is pinging some unreasonably high numbers (cos its blindingly hot)
Couple of main reasons this is occuring.
a) Choice of software used to author the map (not having the correct definitions)
b) Source of the map may be a German provider, and if TUV approved, are not allowed to alter "emissions" related things, which fueling clearly is. UK resellers of German origin code, may be subject to the fueling being lean vs the boost being asked of it, promoting egt protection, high egt's and high timing pull as a consequence. Prolonged egt's is not going to be helpfull for the hardware.. (cracks etc in manifold, turbo hotside etc being a common side effect long term)
The irony of this, is whilst its running factory 0.95 lambda on 100% load under its increased boost, its going to make good power, until its gets too hot and it all falls off rapidly in protection mode.. If you see just a dyno plot of power & torque, ask for the afr and boost to go with it.
If you have vag-com or access to it, and a wideband car... blocks to check would be 031 for lambda request and actual, and 112 for egt, 115 for requsted & actual boost... 020 for timing pull...
We saw a recent thread posted by someone asking if their logs looked "ok" which was comprehensively answered "no" for the reasons mentioned. The company flashing the car did'nt write the code, they installed it.
Beware of this lean running and higher boost. your hardware wont thank you for driving it into egt protection & fuel dumping.
12sec power run in 5th gear load on my dyno brings it in at just over 5krpm typically... imagine when and if you are motoring sustained full throttle, longer.. eak!
muchos glowy, muchos hot....
be carefull when choosing your map provider. ask some pertinent questions before parting with your wedge
Some "mappers", be they mobile or fixed, may be unaware of whats been done and in good faith think they've installed a nice good safe map. They cant read the map to know whats being asked for, they will likely not have those kind of tools (££)
Those with dyno's, loggers, widebands however have no excuse for not testing what they have installed. (ignorance is no defence)